6 (a) Elephants communicate using waves of frequency 10 Hz - Edexcel - GCSE Physics - Question 6 - 2017 - Paper 1
Question 6
6 (a) Elephants communicate using waves of frequency 10 Hz.
(i) Complete the sentence by putting a cross (✗) in the box next to your answer.
These waves can be des... show full transcript
Worked Solution & Example Answer:6 (a) Elephants communicate using waves of frequency 10 Hz - Edexcel - GCSE Physics - Question 6 - 2017 - Paper 1
Step 1
Complete the sentence by putting a cross (✗) in the box next to your answer.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct option is B infrasound. Elephants communicate using infrasound, which refers to sound waves below the frequency of human hearing.
Step 2
State the value of the minimum frequency for ultrasound.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The minimum frequency for ultrasound is 20 000 Hz.
Step 3
Suggest why humans are unable to hear the waves used by the elephants.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Humans are unable to hear the waves used by elephants because these waves have a frequency below the range of human hearing, which is typically between 20 Hz and 20 000 Hz.
Step 4
Complete the sentence by putting a cross (✗) in the box next to your answer.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A P-waves cannot reflect at the boundary.
